Nickel-Catalyzed <i>N</i>-Arylation of Cyclopropylamine and Related Ammonium Salts with (Hetero)aryl (Pseudo)halides at Room Temperature
作者:Joseph P. Tassone、Preston M. MacQueen、Christopher M. Lavoie、Michael J. Ferguson、Robert McDonald、Mark Stradiotto
DOI:10.1021/acscatal.7b02014
日期:2017.9.1
reactivity exceeding that displayed by all previously reported catalysts (Pd, Cu, or other). Our preliminary efforts to effect the N-arylation of cyclopropylamine with (hetero)aryl chlorides at room temperature by use of (L)NiCl(o-tolyl) precatalysts (L = PAd-DalPhos, C1; L = JosiPhos CyPF-Cy, C2) were unsuccessful, despite the established efficacy of C1 and C2 in transformations of other primary alkylamines
金属催化的环丙基胺与芳基亲电试剂的C(sp 2)–N交叉偶联代表了与药物相关的N-芳基环丙基胺的诱人途径,但几乎没有能够实现这种转化的催化剂。本文首次报道了镍在环丙胺和相关亲核试剂(包括铵盐)与(杂)芳基(伪)卤化物的镍催化的C(sp 2)–N交叉偶联反应中的反应范围。由所有先前报告的催化剂(Pd,Cu或其他)显示。我们的初步努力以实现Ñ通过使用环丙胺与(杂)芳基氯化物-arylation在室温(大号NiCl(邻甲苯基)预催化剂(L = PAd-DalPhos,C1 ; L = JosiPhos CyPF-Cy,C2)没有成功,尽管C1和C2在其他伯烷基胺的转化中具有确定的功效。然而,辅助配体(L)结构的系统修饰使这种转化成功,结晶学上表征为(L)NiCl(邻甲苯基)的预催化剂结合了邻苯撑桥联双膦为特征的磷三氧杂金刚烷和PCy 2(L = L3,CyPAd-DalPhos;C3),P(邻甲苯基)2和P(t-